Square D Digest 179

NF Factory Assembled Main Circuit Breakers

NF Panelboards—600Y/347 Vac Max.

Refer to NF Panelboards

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Factory Assembled Main Circuit Breakers—600Y/347 Vac maximum

Table 9.53: NF Panelboard Factory Assembled Interiors—600Y/347 Vac Max

Single Phase 3-Wire (1P/3W), or Three Phase 4-Wire (3P/4W) [41]

Mains Rating (Amps)

Min. Box Depth (inches)

Max. Number of One-Pole Circuit Breakers

Bus Material

Main Lugs Only Circuit Breaker Frame Main Breaker [42]

Main Switch [42]

Main Lugs Only Main Breaker / Switch

ED, EG, EJ [43] HD/HG/HJ/HL/HR JD/JG/JJ/JL/JR

18, 30

Al, Cu Al, Cu Al, Cu Al, Cu

125Max 125Max 250Max 400Max 600Max 800Max

15–125 15–125 150–250 125–400 125–600 600–800 600–800

–

5.75 in. 5.75 in. 5.75 in. 5.75 in. 5.75 in.

5.75 in. 5.75 in. 5.75 in. 5.75 in.

18, 30, 42, 54 [44]

110–125 150–250 300–400 450–600

30, 42, 54, 66

30, 42, 54, 66, 84

LA/LH

LG/LJ/LL/LR [45]

30, 42, 54, 66 [46] , 84

8.75 in. [47] 8.75 in. [49]

Cu Cu

MG

—

8.75 in. [48]

30, 42, 54

PG, PJ, PL

600–800 NOTE: Factory Assembled Main Circuit Breakers (600Y/347 Vac maximum). 600Y/ 347 Vac applications require use of E_B_6___ branch circuit breakers, i.e. EDB16015 for a 1P, 15A circuit. [50]

400 A and 600 A panelboards, 1Ø or 3Ø PowerPacT L-frame - see Tables in Section 7.

9 PANELBOARDS

Table 9.55: PowerPacT L Main Circuit Breaker Cabinet Height (inches) Max. No. of Branch Spaces (Does not include sub-feed circuit breaker spaces) NEMA 1 Enclosure (20 in. W x 8.75 in. D) [51] 400 / 600 A Interior 400A

Table 9.54: Main Circuit Breaker No. of Poles TripUnit Options

Vented NEMA 3R Enclosure (26 in. W x 8.75 in. D) [52]

Ampacity

Frame Sizes

600A

3 LI, LSI, Switch LG, LJ, LL, LR 125–600 A LA/LH, PowerPacT H and J-frame circuit breakers are also available —see Tables in Section 7 and Supplemental Digest Section 3.

30 42 54

68 74 80

68 74 80

74 80 86

Table 9.56: Sub-feed Circuit Breakers for NF Panelboards [53] Interior Mains Rating Mains Type Sub-Feed Circuit Breaker(s) Ampacity Poles MCCBFrame

Space Factor [54]

HD, HG, HJ, HL, HR [55] [56] JD, JG, JJ, JL, JR [56] [57]

2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 2, 3 3 3 3

110 - 150 150 - 250 300 - 400 125 - 600 110 - 150 150 - 250 300 - 400 125 - 400 110 - 150 150 - 250 125 - 400 125 - 600 110 - 150 150 - 250 300 - 400 125 - 600 110 - 400

250 - 800 A Main Lugs

LAor LH

LG, LJ, LL, LR

18 inches

HD, HG, HJ, HL, HR [55] [56] JD, JG, JJ, JL, JR [56] [57]

PowerPacT J or LA/ LH Main Circuit Breaker

250 - 400A

LAor LH [58]

LG, LJ, LL, LR [59]

HD, HG, HJ, HL, HR [55] [56] JD, JG, JJ, JL, JR [56] [57]

18 inches

PowerPacT L Main Circuit Breaker [62]

400 - 600A [60] [61]

LA / LH [58]

12 inches 18 inches 12 inches 18 inches 12 inches 18 inches

LG, LJ, LL, LR [60]

HD, HG, HJ, HL, HR [55] [56] JD, JG, JJ, JL, JR [56] [57]

PowerPacT M, P Main Circuit Breaker

700 - 800A [63]

LA / LH

LG, LJ, LL, LR

3

400 - 800A [58]

Main Circuit Breaker [62]

2, 3 One LA / LH with one H-, or J- frame 36 inches

[41] NF panelboards without neutral connections may be applied in 3-phase, 4-wire grounded Wye systems, except at the Service Entrance. [42] Factory Assembled Interiors are rated for trip current of Main Breaker / Switch. [43] Back-Fed Main Breaker applications only. [44] Three Phase Copper only. [45] PowerPacT L crcuit breakers may only be installed on 600 A NF panelboard interiors. 400 A max. PowerPacT L circuit breakers should be selected for applications requiring trip ampacities between 125–400 A. [46] NF Panelboards with PowerPacT L Main Circuit Breaker or Switch are limited to a maximum of 54 branch circuits. [47] NF Panelboards with PowerPacT L Main Circuit Breaker or Switch require 8.75 in. deep enclosures and three point latch trim fronts. [48] Enclosures limited to NEMA Type 1 only. [49] 8.75 in. Enclosures limited to 26 in. Wide NEMA Type 1. [50] Requires use of ExBx6xxx branch circuit breakers, i.e. EDB16015 for a 1P, 15A circuit. [51] D9 8.75 in. deep enclosure and three point latch door is required for PowerPacT L Main Circuit Breaker, Switch, or Sub-Feed Circuit Breaker. See Table 9.45 NF Main Circuit Breaker Interiors - Use I-Line Panelboard for 3Ø3W applications above 240 Vac, page 9-24. [52] PowerPacT L not available in non-vented (NEMA Type 3R/5/12, or 4/4X) enclosures. [53] See Digest Section 7 for Interrupting Ratings and Catalog Numbers of PowerPacT H-, J-, L-, and LA/LH frame MCCBs. NEMA 3R applications with sub-feed breakers greater than 150 A require 8.75 in. deep, 26 in. wide enclosure - reference PBA603WP for dimensions. [54] Space Factor is the length required for sub-feed circuit breaker. Please reference Product Selector output for panelboard enclosure dimensions. [55] Three pole HD, HG, HR MCCBs are installed for single phase sub-feed circuit breaker applications. [56] One or two sub-feed circuit breakers may be selected. [57] Three pole JR MCCBs are installed for single phase sub-feed circuit breaker applications. [58] NF Panelboards with LA / LH sub-feed circuit breakers are shipped fully assembled. [59] NF Panelboards with PowerPacT L main and sub-feed circuit breakers require 26 in. wide, 8.75 in. deep enclosure with 3-point latch trim front. Reference PBA758 or PBA754 drawings for dimensions in NEMA Type 1 or 3R enclosures, respectively. [60] NF Panelboards with PowerPacT L circuit breakers require 8.75 in. a deep enclosure with 3-point latch trim front. Reference PBA559x drawings for dimensions, where x may be blank, HR, HRT, or T. [61] Add 6 in. to space factor for NF Panelboards with 600 A PowerPacT L circuit breakers in NEMA 3R enclosures. Reference PBA754 drawing for dimensions. Maximum sub-feed breaker is 400 A when installed with a 600 A rated main circuit breaker in a NEMA 3R enclosure. [62] NF Panelboards with PowerPacT L main circuit breaker and any sub-feed circuit breaker(s) are shipped completely assembled in 26 in. wide, 8.75 in. deep enclosures, with gutter mounted neutral assemblies. [63] NF Panelboards with 800 A rated main circuit breaker are shipped completely assembled in 26 in. wide, 8.75 in. NEMA 1 enclosures. Reference PBA756 or PBA756HR drawing for dimensions.

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